Tailoring the shape of vanadium nanoparticles produced by gas aggregation source

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10454453" target="_blank" >RIV/00216208:11320/22:10454453 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Vj0BxSUF5O" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Vj0BxSUF5O</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.vacuum.2022.111545" target="_blank" >10.1016/j.vacuum.2022.111545</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tailoring the shape of vanadium nanoparticles produced by gas aggregation source

Popis výsledku v původním jazyce

In this study, we have analyzed experimentally different strategies for controlling the morphology of vanadium nanoparticles produced by means of a magnetron-based gas aggregation source. It is shown that while low magnetron currents and aggregation pressures lead to the formation of cubic vanadium nanoparticles, which is most likely connected with different kinetics growth modes on {100} and {110} surfaces of vanadium, higher magnetron currents and pressures result in the spherical-like but highly irregular morphology of produced NPs. Furthermore, it was found that the size of the nanoparticles may be adjusted by introducing He into the working gas mixture. An increase in the He partial pressure causes a substantial decrease in the size of nanoparticles but has no impact on their shape. This effect is predominately connected with the enhanced nucleation caused by He, which favours the production of a higher number of smaller nanoparticles. Finally, the vanadium nanoparticles, irrespective of their initial shape, may be transformed into fully spherical ones by introducing oxygen into the main deposition chamber, which is connected by their extensive heating during their in-flight oxidation.

Název v anglickém jazyce

Tailoring the shape of vanadium nanoparticles produced by gas aggregation source

Popis výsledku anglicky

In this study, we have analyzed experimentally different strategies for controlling the morphology of vanadium nanoparticles produced by means of a magnetron-based gas aggregation source. It is shown that while low magnetron currents and aggregation pressures lead to the formation of cubic vanadium nanoparticles, which is most likely connected with different kinetics growth modes on {100} and {110} surfaces of vanadium, higher magnetron currents and pressures result in the spherical-like but highly irregular morphology of produced NPs. Furthermore, it was found that the size of the nanoparticles may be adjusted by introducing He into the working gas mixture. An increase in the He partial pressure causes a substantial decrease in the size of nanoparticles but has no impact on their shape. This effect is predominately connected with the enhanced nucleation caused by He, which favours the production of a higher number of smaller nanoparticles. Finally, the vanadium nanoparticles, irrespective of their initial shape, may be transformed into fully spherical ones by introducing oxygen into the main deposition chamber, which is connected by their extensive heating during their in-flight oxidation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Vacuum

ISSN

0042-207X

e-ISSN

1879-2715

Svazek periodika

206

Číslo periodika v rámci svazku

206

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

111545

Kód UT WoS článku

000876939700001

EID výsledku v databázi Scopus

2-s2.0-85139051472